False teachers flourish where there is no scrutiny. That’s why so many of them set up camp in environments where there is little to no biblical discernment—where God’s Word is nothing more than a supplement to personal experience, anecdote, and embellishment.

Why do the heavy lifting of careful Bible study when one can simply “let go” and be drawn into the gravitational pull of a religious guru? Our short attention span and quick-fix culture is easily preyed upon by charismatic sideshows, feel-good philosophy, and the television hucksters of modern pseudo-Christianity.

But we are derelict in our Christian duty if we allow that to happen to us and our churches. When the apostle Paul says to “examine everything” (1 Thessalonians 5:21), he is calling on all Christians to practice careful biblical discernment in all realms of life.

That may surprise some Christians who see discernment as uniquely a pastoral responsibility. It is certainly true that pastors and elders have an even greater duty to be discerning than the average layperson. Most of the calls to discernment in the New Testament are issued to church leaders (1 Timothy 4:6-7, 13, 16; Titus 1:9). Every elder is required to be skilled in teaching truth and able to refute unsound doctrine.

As a pastor, I am constantly aware of this responsibility. Everything I read, for example, goes through a grid of discrimination in my mind. If you were to look through my library, you would instantly be able to identify which books I have read. The margins are marked. Sometimes you’ll see approving remarks and heavy underlining. Other times you’ll find question marks—or even red lines through the text. I constantly strive to separate truth from error. I read that way, I think that way, and of course I preach that way. My passion is to know the truth and proclaim it with authority. That should be the passion of every elder, because everything we teach affects the hearts and lives of those who hear us. It is an awesome responsibility. Any church leader who does not feel the burden of this duty ought to step down from leadership.

But discernment is not only the duty of pastors and elders. The same careful discernment Paul demanded of pastors and elders is also the duty of every Christian. First Thessalonians 5:21 is written to the entire church: “Examine everything carefully.”

The Greek text is by no means complex. The word “carefully” has been added by the translators to make the sense clear. If we translate the phrase literally, we find it simply says, “Examine everything.” But the idea conveyed by our word carefully is included in the Greek word translated “examine,” dokimazō. This is a familiar word in the New Testament. Elsewhere it is translated “analyze,” “test,” or “prove.” It refers to the process of testing something to reveal its genuineness, such as in the testing of precious metals. Paul is urging believers to scrutinize everything they hear to see that it is genuine, to distinguish between the true and the false, to separate the good from the evil. In other words, he wants them to examine everything critically. He is effectively saying, “Judge everything.”

Typically someone will be quick to push back against that command citing Matthew 7:1: “Judge not, that you be not judged.” As if that somehow rules out any kind of critical or analytical appraisal of what others believe. Was Jesus forbidding Christians from judging what is taught in His name?

Obviously not. The spiritual discernment Paul calls for is different from the judgmental attitude Jesus forbade. In Matthew 7, Jesus went on to say,

For with the judgment you pronounce you will be judged, and with the measure you use it will be measured to you. Why do you see the speck that is in your brother’s eye, but do not notice the log that is in your own eye? Or how can you say to your brother, “Let me take the speck out of your eye,” when there is the log in your own eye? You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brother’s eye. (Matthew 7:2–5)

What Jesus condemned was the hypocritical judgment of those who held others to a higher standard than they themselves were willing to live by. He was certainly not suggesting that all judgment is forbidden. In fact, Jesus indicated that taking a speck out of your brother’s eye is the right thing to do—if you first get the log out of your own eye.

Elsewhere in Scripture, we are forbidden to judge others’ motives or attitudes. We are not able to discern “the thoughts and intentions of the heart” (Hebrews 4:12). That is a divine prerogative. Only God can judge the heart, because only God can see it (1 Samuel 16:7). He alone knows the secrets of the heart (Psalm 44:21). He alone can weigh the motives (Proverbs 16:2). And He alone “will judge the secrets of men through Christ Jesus” (Romans 2:16). That is not our role. “Therefore do not go on passing judgment before the time, before the Lord comes, who will bring to light the things now hidden in darkness and will disclose the purposes of the heart” (1 Corinthians 4:5).

What is forbidden is hypocritical judging and judging others’ thoughts and motives. But other forms of judgment are explicitly commanded. Throughout Scripture the people of God are urged to judge between truth and error, right and wrong, good and evil. Jesus said, “Judge with righteous judgment” (John 7:24). Paul wrote to the Corinthian believers, “I speak as to wise men; you judge what I say” (1 Corinthians 10:15). Clearly, God requires us to be discriminating when it comes to matters of sound doctrine.

We are also supposed to judge one another with regard to overt acts of sin. Paul wrote, “Do you not judge those who are within the church? But those who are outside, God judges. ‘Remove the wicked man from among yourselves’” (1 Corinthians 5:12–13). That speaks of the same process of discipline outlined by Jesus Himself in Matthew 18:15-20.

At least one other kind of judgment is expressly required of every believer. We must examine and judge our own selves: “If we judged ourselves rightly, we would not be judged” (1 Corinthians 11:31). This calls for a careful searching and judging of our own hearts. Paul called for this self-examination every time we partake of the Lord's Supper (1 Corinthians 11:28). All other righteous forms of judgment depend on this honest self-examination. That is what Jesus meant when He said, “First take the log out of your own eye” (Luke 6:42).

Clearly, then, the command in 1 Thessalonians 5:21 to “examine everything,” in no way contradicts the biblical prohibition against being judgmental. The discernment called for here is doctrinal discernment. The conjunction at the beginning of this verse—“but examine everything”—ties it to the “prophecies” mentioned in verse 20. But this command would certainly include any message that claimed to carry divine approval or authority.

The unusually gullible Thessalonians seemed to have a problem in this regard. Like many today, they were eager to believe whatever was preached in the name of Christ. They were undiscriminating. That’s why Paul addresses this continual lack of discernment in both of his Thessalonian epistles. There is evidence in the first epistle, for example, that someone had confused the Thessalonians about the return of Christ. They were going through a time of severe persecution, and apparently some of them thought they had missed the Second Coming. In chapter 3 we learn that Paul had sent Timothy from Athens specifically to strengthen and encourage them in their faith (1 Thessalonians 3:2). They were unaccountably confused about why they were being persecuted. Paul had to remind them, “You yourselves know that we have been destined for this. For indeed when we were with you, we kept telling you in advance that we were going to suffer affliction” (1 Thessalonians 3:3-4).

Evidently someone had also taught them that believers who died before the Second Coming of Christ would miss that event entirely. They were in serious confusion. Chapters 4–5 contain Paul’s efforts to correct that confusion. He tells them that the dead in Christ will rise and be caught up with the living (1 Thessalonians 4:16-17). And he assures them that although that day will come like a thief in the night (1 Thessalonians 5:2), they need not fear being caught off guard (1 Thessalonians 5:3-6).

Incredibly, shortly after this, Paul had to write a second epistle, again assuring the Thessalonians that they had not missed some great event on the prophetic calendar. Someone, it seems, had sent them a counterfeit epistle claiming to be from Paul and suggesting that the day of the Lord had come already. They should not have been duped by such a ploy because Paul had written so plainly in his first epistle. He wrote them again:

Now we request you, brethren, with regard to the coming of our Lord Jesus Christ and our gathering together to Him, that you be not quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come. Let no one in any way deceive you. (2 Thessalonians 2:1-3)

There was no excuse for their chronic gullibility.

Why were they so vulnerable to false teaching? Surely it was because they lacked biblical discernment. The Thessalonians did not examine everything in light of God's Word. If they had, they would not have been so easily hoodwinked. And that is why Paul urged them to “examine everything.”

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